Download jruby complete:
curl -O http://jruby.org.s3.amazonaws.com/downloads/1.7.13/jruby-complete-1.7.13.jar
Now rename it:
mv jruby-complete-1.7.13.jar scss.jar
Next install gems:
java -jar scss.jar -S gem install -i gems sass --no-document --no-format-executable
java -jar scss.jar -S gem install -i gems bourbon --no-document --no-format-executable
java -jar scss.jar -S gem install -i gems neat --no-document --no-format-executable
Finally bundle it:
jar uf scss.jar -C gems .
The new jar
File can now be used like this:
java -jar scss.jar -S scss styles.scss
This worked fine for me. I substituted in JRuby 9.1.12.0, and didn't have any issues